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UNITED sTATEs PATENT oEEroE.

JoHN M.` PRATT, oF DUDLEY, MASSACHUSETTS.l

IMPROVEMENT ON HURDS PATENT METALLIC NAPPER FOR NALEPING CLOTH.

Specification of Letters Patent No. 957, dated October 3, 1838.V

with my improvement, will appear from the drawings hereunto annexed.

Figure l, exhibits a side view of the whole machine. It is in the form of a cylinder, and receives a rotary motion from the shaft A, to one end of which are attached a tight and a loose pulley B, and motion is communicated to the machine by means of a belt applied to the tight pulley, and the motion may be stopped by sliding the belt upon the loose pulley. The side view of the machine,

presents the alternate rows or flats of me-V tallic points as C, C, and the gages, D, D, interposed between them.

Fig. 2 represents an end view of the machine. A, is the end of the cylinder which may beof metal or wood; and B, is the end of the shaft. C, C, are the ends of the rows or flats of metallic points, and D, D, the ends of the gages.

Fig. 3, represents one of the gages` separate and entire. `They may be of metal or wood. The one represented in this figure is made of three pieces connected by ljoints at A, A. The gage is attached to the cylinder by means of the screws B, B, B, B, and by means thereof the gage or any part of 1t, may be elevated or depressed at pleasure. This having the gage in parts will be mainly useful in raising the nap on broadcloths;- in the manufacture of narrower cloths, no such joints in the gage will be necessary, but it may be one straight entire piece.

. Fig. 4t, represents a single row of the metallic points, as attached or soldered to apiece of tin or other elastic metal, in the form of a common hair comb. These pieces of tin with the metallic points fastened to them as above described, are soldered to a plate of tin or other metal, this plate of tin or other metal is placed upon and fastened to the cylinder, and thus is formed a row or flat of the metallic points, answering to f the fiat of teazels used for the same purpose. The number of these combs, or pieces of tin with metallic points to constitute a flat, may be varied at pleasureg-in the model accompanying the drawings, the number is six. The width of the pieces of tin and the length of the metallic points, may also be varied at pleasure, so Vas to make the same more or less elastic and yielding as the kind of manufacture may require.

The object o-f the invention2 is to supersede the use of teazels in raising a nap on woolens. In the original invention by Hurd, the practical difliculty is, that the metallic points are inserted by means of solder between solid and lpermanent pieces of metal, so that the points are wholly unyielding, and thus cut the nap.` My improvement in this particular, consists in attaching the metallic points to the pieces of tin or other elastic metal, so `that Vthe points will not only be elastic and yield? ing, but will be kept free and separate, and thus the work will be done without cutting the nap, and in a manner fully equal, i not better, than the work done by teazels.

The other improvement in my machine, is the gage. Bymeans of this gage thecloth or any part of it, may be let down more or less upon the metallic points, and thus the work, or any part of it, proceeds faster or slower at pleasure. The length of the gages must depend upon the width of the cloth to be manufactured, and, as before suggested, when the cloth is narrow there will be no need of any joints in the gage, and a less number of screws will be `necessary for its regulation.

vThe operation of my machine, except in the particulars before indicated, is much like that of the ordinary teazel gig machine.

The cylinder is turnedV by means of a belt applied to the fast pulley at the end of the shaft, and the cloth is let upon the cylinder, after the gages are properly adjusted, much as it is let upon the common gig; the object of the invention being to` supply what hasV 2. Not the placing of gagesbetween the flats, but the mode of regulating the gages.`

as herein before described, so as to equalize and perfect the operation of napping.

In Witness of all which I have hereuntov set my hand this twenty second day of No- 15 vember A, D. 1837.

JOHN M. PRATT. Witnesses:

THoMAs BoTToMLY, SALEM TOWNE. 

